Strict mode Passingnon-Strict mode Passing
Features:
- Symbol
// Copyright (C) 2015 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-weakset.prototype.add description: Throws TypeError if `this` is not Object. info: | WeakSet.prototype.add ( value ) 1. Let S be the this value. 2. If Type(S) is not Object, throw a TypeError exception. features: [Symbol] ---*/ assert.throws(TypeError, function() { WeakSet.prototype.add.call(Symbol(), {}); }); assert.throws(TypeError, function() { var s = new WeakSet(); s.add.call(Symbol(), {}); });